Abstract
Recent studies of properties of heavy quasiparticles have helped to establish thatf electrons and conduction electrons in the normal states of certain U and Ce compounds are characterised by Fermi volumes consistent with Luttingeris Theorem and by integrated qnasiparticle masses which agree with measured linear coefficients of the specific heat. Evidence is presented that this Fermi Liquid picture may, however, break down when the ground state is near pressure or magnetic field induced phase transitions.
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S.R. Julian, S.V. Brown, I.R. Walker and G.G. Lonzarich, to be published.
S.R. Julian, F.S. Tautz, G.J. McMullan and G.G. Lonzarich, Proc. of Inter. Conf. on Correlated Electron Systems, Aug. 1993, Physica B Cond. Matter.; for CeRu2Si2 see also Y. Onuki, A.K. Albessard, H. Aoki and S. Uji ibid.
C. Pfleiderer, G.J. McMullan and G.G.Lonzarich, Proc. of Inter. Conf. on Correlated Electron Systems, Aug. 1993, Physica B Cond. Matter.
A.P. Mackenzie, S.R. Julian, G.G. Lonzarich, A. Carrington, S.D. Hughes, R.S. Liu and D.C. Sinclair, Phys. Rev. Lett. 71, 1238 (1993).
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The research has been supported by the Science and Engineering Research Council of the UK.